Is Spring Boot suitable for monolith?

Question

Java

There is a task to write enough "custom" monolithic application. If the idea shoots, then it will already be possible to break it into subservices and so on (not so important yet). I want to write in Java, take Spring as a platform.
I understand that Spring Boot is most often mentioned in microservice architecture, when you need to write a typed microservice and connect it to the infrastructure. And Spring Boot itself is a prepared configuration that is easy to start, but at the same time it is difficult to customize it (if necessary).
Actually, the question is whether Spring Boot is suitable for a monolith with sufficiently custom logic, or should "full-fledged Spring" be used.
Ps Or point out that I generally misunderstand this.

Answer 1

Boot is just an autoconfigurator and launcher for Spring applications. He doesn't care what architectural principles this application is built on.